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87GN misses at idle
Hi, my 87GN misses at idle, its like it has a slight popping out the tail pipe, just wondering if this could be a cam lobe worn ???
Has anyone else had a problem with their GN cams wearing to fast? |
#2
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Re: 87GN misses at idle
had a miss on an 86 hot air motor + it was a faulty idle air motor.
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#3
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Re: 87GN misses at idle
Thanks for the reply Bill, my IAC is brand new and reset.
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Re: 87GN misses at idle
A slight miss is the toughest to track down ... here's some thoughts:
__________________
Ken Mosher 1987 GN original owner 650+ HP Black 2015 BMW 328xi XDrive wagon 2012 Volkswagen Tiguan (the Tig!) Night Blue Met (sold) 2006 Trailblazer SS Red Jewel Tint 395 HP AWD (sold) 2014 Silverado LTZ Crew 4WD 2012 Honda VFR 1200F Tahitian Blue (sold) 2015 BMW S1000R Racing Red 2013 Honda CBR500R Red (wife's bike) 2014 Triumph Bonneville T100 2003 Harley Davidson V Rod Anniversary Edition |
#5
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Re: 87GN misses at idle
Hi Ken yes it is a tough one, most of those things you listed I have gone thru. I am starting to think it is a rounded cam lobe or injector.Crank sensor Pvc ignition mod and IAC new,and IAC reset - works great egr is working fine, I dont have a scan tool yet working on that one. And if anything it is running rich (cannot pass emissions) (Brand new build with 1000 Kms on it).There are no vacuum leaks. Thanks for the reply !
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#6
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Re: 87GN misses at idle
Im No Expert But If Its A Recent Rebuild With 1000 Kms I Would Think That The Cam Would Be Good (and Everything Else Replaced)and Look At The Injectors First. Kenmosher Was Right On The Button With Mine (crank Sensor) It Had A Light Miss To It (only At Idle) Then It Just Went Up And Died On Me!! And I Was Clueless!! Still Am!!
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#7
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Re: 87GN misses at idle
The cam is an old one but only 3 years old, so still a possibility. Crank sensor is 2 years old but could still be the problem Thanks for the reply. Its weird how it is only at idle, it runs great on the highway.
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#8
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Re: 87GN misses at idle
Could be a lifter not staying pumped up at lower pressures. Even if the cam is good.
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Scott Keller - GNTTYPE Founder & Moderator
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